Re: CREATING INDEX on column having null values

Hello Suhas,

You need to supply good information for an accurate answer. Please have a look at this link:

http://wiki.postgresql.org/wiki/Slow_Query_Questions

Kind regards,
Willem

> Date: Wed, 5 Dec 2012 00:10:10 -0800
> From: suhas(dot)b(at)verse(dot)in
> To: pgsql-performance(at)postgresql(dot)org
> Subject: [PERFORM] CREATING INDEX on column having null values
>
> Hi,
>
>
> I have a partitioned table(partitioned on date) .There are about 1 million
> insertions per day. There is a column called mess_id. This column is updated
> .But update query is taking huge time.When i checked , this column is not
> unique, and most of the time its having null . Say everyday out of 1
> million only 20K rows are not null for this column ;.Insertions are
> happening very fast , but update is very slow.
>
> How to optimize my update query? Is it good to create index on that
> column .. i m worried about my insertions getting slow
>
> Rgrds
> Suhas
>
>
>
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